CN103578520A - Drive circuit and drive method - Google Patents
Drive circuit and drive method Download PDFInfo
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- CN103578520A CN103578520A CN201210282290.4A CN201210282290A CN103578520A CN 103578520 A CN103578520 A CN 103578520A CN 201210282290 A CN201210282290 A CN 201210282290A CN 103578520 A CN103578520 A CN 103578520A
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Abstract
The invention relates to a drive circuit which comprises a first drive module, a second drive module and a protection circuit, wherein the first drive module is used for operating at first operation voltage in a first mode, and is powered off in a second mode; at least one part of the second drive module is used for operating at first protection voltage in the first mode, and used for operating at a second operation voltage in a second mode, wherein the second operation voltage and the protection voltage are both lower than the first operation voltage; the protection circuit is used for receiving the first operation voltage in the first mode, used for providing the protection voltage to the second drive module, used for receiving the second operation voltage in the second mode, and used for providing the second operation voltage to the second drive module. The invention further discloses a relevant drive method.
Description
Technical field
The present invention, relevant for driving circuit and driving method, is particularly to operate in driving circuit and driving method under majority operation voltage.
Background technology
Fig. 1 has illustrated the calcspar of the driving circuit 100 of known technology.As shown in Figure 1, driving circuit 100 has comprised driver module 101,103, according to input signal D
iNproduce drive current I
1and I
2to connection gasket 107.Driving circuit 100 comprises an operating voltage receiving end 106 and receives operating voltage V
oP, the operating voltage of usining as driver module 101,103.Driving circuit 100 may be used to drive different electronic installations, so driver module 101,103 conventionally can be designed to one and be adapted at operation with high pressure, and that another is adapted at is low voltage operated, to coordinate different electronic installations, and operating voltage V
oPalso can be different.For instance, driving circuit 100 is in order to drive LPDDR
1(the DDR that mobile device is used
1) time, operating voltage V
oPfor 1.8V, and driving circuit 100 is in order to drive LPDDR
2(the DDR that mobile device is used
2) time, operating voltage V
oPfor 1.2V.In driver module 101, be high voltage bearing element, can under 1.8V, operate.In driver module 103, for bearing the element of high pressure, be adapted at operating under 1.2V.
In the operation of known technology, as operating voltage V
oPduring for 1.2V, state driver module 103 normal operations of driver module 101 for closing.As operating voltage V
oPduring for 1.8V, driver module 101 normal operations but driver module 103 can close to avoid destroyed.Yet, because input signal D
iNbe not to determine voltage, but the continuous signal of change, that therefore can cause that driver module 103 cannot be complete closes and causes leakage current, if but all change the element in driver module 103 into high voltage bearing element, can make circuit area increase.
Summary of the invention
Therefore, an object of the present invention is for providing a kind of driving circuit and driving method operating under different operating voltage.
One embodiment of the invention have disclosed a kind of driving circuit, comprise: the first driver module operates in one first operating voltage, and closes in one second pattern under a first mode; One second driver module, wherein at least one part of this second driver module operates in a protection voltage under this first mode, and under this second pattern, operate in one second operating voltage, wherein this second operating voltage and this protection voltage are all lower than this first operating voltage; One holding circuit receives this first operating voltage and provides this protection voltage to this second driver module under this first mode, and under this second pattern, receives this second operating voltage and provide this second operating voltage to this second driver module.
According to aforesaid embodiment, can obtain a driving method, its step can be pushed away by aforesaid embodiment, therefore repeat no more in this.
By aforesaid embodiment, the mode by protection voltage is provided under high-voltage state, can, in the situation that not increasing too many circuit area, make driving circuit can operate in normally different operating voltages.
Accompanying drawing explanation
Fig. 1 has illustrated the calcspar of the driving circuit of known technology.
Fig. 2 has illustrated the calcspar that operates in the driving circuit under first mode according to the embodiment of the present invention.
Fig. 3 has illustrated the calcspar that operates in the driving circuit under the second pattern according to the embodiment of the present invention.
Fig. 4,5 has illustrated in Fig. 2 and Fig. 3, the detailed circuit of driver module and holding circuit.
Fig. 6 has illustrated other demonstrative circuits of holding circuit.
Fig. 7 has illustrated the detailed circuit of the predriving stage shown in Fig. 4 and driving stage.
Fig. 8 has illustrated the driving method according to the embodiment of the present invention.
Main element symbol description
100,200 driving circuits
101,103,201,203 driver modules
106,206 operating voltage receiving ends
107 connection gaskets
205 holding circuits
208 protection voltage receiving ends
401,405 predriving stages
403,407 driving stages
409,411,601 on-off elements
602,604 output terminals
603 variable resistors
701,703 potential regulators
705,707 impact dampers
709 phase inverters
711P type MOS (metal-oxide-semiconductor) transistor
713N type MOS (metal-oxide-semiconductor) transistor
Embodiment
Fig. 2 has illustrated the calcspar that operates in the driving circuit 200 under first mode according to the embodiment of the present invention.It is noted that, under embodiment with Fig. 1 for example 1.8v, 1.2v the operation of driving circuit 200 is described, but do not represent that driving circuit 200 is only applicable under these two kinds of voltages, it can change in response to the difference of institute's drive electronics or element the combination of voltage.As shown in Figure 2, driving circuit 200 has comprised driver module 201,203, and holding circuit 205.In driver module 201, be high voltage bearing element, can under 1.8v, operate normally.In driver module 203, for bearing the element of high pressure, be therefore adapted at operating under 1.2v.Under first mode, the operating voltage that operating voltage receiving end 206 receives is V
oPH(1.8v), time, driver module 201 can receive operating voltage V
oPHand operate in operating voltage V
oPHunder.Holding circuit 205, under first mode, can receive operating voltage V
oPHbut output protection voltage V
p(in this example, being 1.1v), at least one portion of element of driver module 203, makes at least one portion of element of driver module 203 operate in protection voltage V
prather than operate in operating voltage V
oPHunder.Thus, at least one portion of element of driver module 203 is able to protected and can be by operating voltage V
oPHdestroy, and can maintain the state of startup, can avoid in known technology, because input signal D
iNvariation and have the problem of leakage current.
Refer to Fig. 3, Fig. 3 has illustrated the calcspar that operates in the driving circuit under the second pattern according to the embodiment of the present invention.In the second pattern, the operating voltage that operating voltage receiving end 206 receives is V
oPL(1.2v), the state of driver module 201 for closing.Because driver module 203 can operate under 1.2v normally, so holding circuit 205 can output function voltage V
oPLgive driver module 203, make driver module 203 operate in operating voltage V
oPLunder.Holding circuit 205 can receive from the control signal CS of control circuit 207 and determine to want output protection voltage V
por operating voltage V
oPL.In an embodiment, control circuit 207 is coupled to operating voltage receiving end 206 and detects the voltage on operating voltage receiving end 206, and control protection electric circuit 205 carrys out output protection voltage V according to this
por operating voltage V
oPL.But please be careful other controlling mechanisms that can reach identical effect also can use in the present invention.Control circuit 207 can be a hardware circuit, but also a piece of wood serving as a brake to halt a carriage body can be write to the function of reaching control circuit 207 as the element of microprocessor and so on.
It is noted that, aforementioned embodiment is not only in order to limit the present invention for explanation.As previously mentioned, driving circuit 200 is not limited to operate under the voltage combination of 1.8v, 1.2v.And, protection voltage V
palso be not limited in 1.1v.Therefore, as long as operating voltage V
oPHbe greater than operating voltage V
oPL, and protection voltage V
pbe less than or equal to operating voltage V
oPL, V
oPH, V
oPLand V
pcan be any value.In addition, holding circuit 205 can be as shown in Figure 2 and Figure 3 as, receive in addition protection voltage V
p, and under first mode, do not make operating voltage V
oPHby exporting received protection voltage V
p, but also can under first mode, adjust operating voltage V
oPHproduce protection voltage V
p.This type of variation all should be within the scope of the present invention.
Fig. 4 has illustrated in Fig. 2 and Fig. 3, the detailed circuit of driver module and holding circuit.As shown in Figure 4, driver module 201 has comprised predriving stage 401 (pre-driving stage) and driving stage 403 (driving stage), and driver module 203 has comprised predriving stage 405 and driving stage 407.Predriving stage 401,405 is respectively according to input signal D
iNvoltage (being input voltage) produce respectively predrive voltage V
pre1and V
pre2.Driving stage 403,407 is according to predrive voltage V
pre1and V
pre2produce drive current I
1and I
2.In an embodiment, predriving stage 401,405 is potential regulator (level shifter), in order to the current potential of adjusting input voltage to produce predrive voltage V
pre1and V
pre2.The predriving stage 405 of driver module 203 and driving stage 407 at least one operate in protection voltage V under first mode
p, and under the second pattern, operate in this operating voltage V
oPL.Fig. 4 and Fig. 5 have illustrated respectively the different mode of connection of driver module 203.In Fig. 4, only there is predriving stage 405 to be connected to holding circuit 205, driving stage 407 is to be connected in operating voltage receiving end 206.Therefore, only there is predriving stage 405 to be protected, can under first mode, operate in protection voltage V
pand under the second pattern, operate in operating voltage V
oPL, and driving stage 407 is the same with driver module 203, operates in operating voltage V under first mode
oPHand under the second pattern, operate in operating voltage V
oPL.In Fig. 5, two elements are all protected.Therefore,, under the disclosed concept of the present invention, can, for different designs or demand, the different elements of driver module be protected.The mode of connection that please be careful Fig. 4 is corresponding to Fig. 2,3 the mode of connection, and knows the art person when knowing that the content how to disclose according to Fig. 5 changes Fig. 2,3 the mode of connection, therefore repeat no more in this.
In addition, in the embodiment of Fig. 4 to Fig. 5, holding circuit 205 has comprised on-off element 409 and 411, and it moves according to control signal CS.On-off element 409 has a receiving end T who is coupled to operating voltage receiving end 206
1and there is an output terminal O who is coupled to driver module 203
1, under first mode, make receiving end T
1with output terminal O
1between not conducting and make operating voltage V
oPHcannot export, and make receiving end T under the second pattern
1with output terminal O
1between conducting with output V
oPL.On-off element 411, has the receiving end T that is coupled to protection voltage receiving end 208
2and there is the output terminal O that is coupled to driver module 203
2, under first mode, make receiving end T
2with output terminal O
2between conducting with output protection voltage V
pand under this pattern, make receiving end T
2with output terminal O
2between not conducting, make to protect voltage V
pcannot export.
And as previously mentioned, holding circuit 205 can be as shown in Figure 2 and Figure 3 as, receive in addition protection voltage V
p, and under first mode, do not make operating voltage V
oPHby exporting received protection voltage V
p, but also can under first mode, adjust operating voltage V
oPHproduce protection voltage V
p.Therefore in Fig. 6 (b); holding circuit 205 comprises variable resistor 603; its one end is connected to operating voltage receiving end 206, can, according to being to adjust the resistance value of variable resistor 603 in first mode or the second pattern, make holding circuit 205 be able to produce protection voltage V under first mode
pand under the second pattern, produce operating voltage V
oPL.The control signal CS that the resistance value of variable resistor 603 also can be produced by control circuit 207 controls.Detailed speech, variable resistor 603 can be considered a voltage and adjusts element, receives the first operating voltage V under first mode
oPHand adjust the first operating voltage V
oPHto form protection voltage V at output terminal 604
p, and under the second pattern, receive the second operating voltage V
oPLand in output terminal 604 this second operating voltage V
oPL, but can replace by other elements with identical function.
Fig. 7 has illustrated the detailed circuit of the predriving stage shown in Fig. 4 and driving stage.As shown in Figure 7, predriving stage 405 has comprised potential regulator (level shifter) 701,703, impact damper 705,707, and phase inverter 709.407 of driving stages have comprised P type MOS (metal-oxide-semiconductor) transistor 711 and N-type MOS (metal-oxide-semiconductor) transistor 713.Potential regulator 701,703 is in order to adjust input signal D
iNvoltage potential, impact damper 705,707 is in order to the driving force of the voltage that increases potential regulator 701,703 and produce.709 of phase inverters are in order to allow P type MOS (metal-oxide-semiconductor) transistor 711 and N-type MOS (metal-oxide-semiconductor) transistor 713 conducting simultaneously or not conducting.Fig. 7 corresponds to the embodiment of Fig. 4, so all elements in predriving stage 405 can be coupled to holding circuit 205, and driving stage 407 can be coupled to operating voltage receiving end 208.Circuit structure in Fig. 7 also can be used in the embodiment shown in fig. 5, knows the connected mode of the art person in the time can understanding circuit structure in Fig. 7 and also use at the embodiment shown in Fig. 5 according to the announcement of Fig. 5 and Fig. 7, therefore repeat no more in this.
According to aforesaid embodiment, can obtain a driving method, comprised step as shown in Figure 8:
Make one first driver module (as 201) under a first mode, operate in one first operating voltage V
oPH, and close in one second pattern.
When first mode, allow one second driver module (as 203) not receive the first operating voltage V
oPHand receive a protection voltage V
p, and under the second pattern, make the second driver module receive one second operating voltage V
oPL, wherein this second operating voltage and this protection voltage are all lower than this first operating voltage.
Make at least one part of the second driver module under first mode, operate in protection voltage V
pand under the second pattern, operate in the second operating voltage V
oPL.
Other detailed steps can be pushed away by previous embodiment, in this, repeat no more.
By aforesaid embodiment, the mode by protection voltage is provided under high-voltage state, can, in the situation that not increasing too many circuit area, make driving circuit can operate in normally different operating voltages.
The foregoing is only preferred embodiment of the present invention, all equalizations of doing according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (11)
1. a driving circuit, comprises:
One first driver module operates in one first operating voltage under a first mode, and closes in one second pattern;
One second driver module, wherein at least one part of this second driver module operates in a protection voltage under this first mode, and under this second pattern, operate in one second operating voltage, wherein this second operating voltage and this protection voltage are all lower than this first operating voltage; And
One holding circuit receives this first operating voltage and provides this protection voltage to this second driver module under this first mode, and under this second pattern, receives this second operating voltage and provide this second operating voltage to this second driver module.
2. driving circuit as claimed in claim 1, is characterized in that, this protection voltage is not more than this second operating voltage.
3. driving circuit as claimed in claim 1, is characterized in that, this second driver module comprises:
One predriving stage, in order to according to an input voltage to produce a predrive voltage; And
One driving stage, in order to produce a drive current according to this predrive voltage;
Wherein this predriving stage, or this predriving stage and this driving stage operate in this protection voltage under this first mode, and operate in this second operating voltage under this second pattern.
4. driving circuit as claimed in claim 3, is characterized in that, this predriving stage comprises a potential regulator, in order to the current potential of adjusting this input voltage to produce this predrive voltage.
5. driving circuit as claimed in claim 1, is characterized in that, also comprises:
One operating voltage receiving end, receives this first operating voltage during this first mode, and receives this second operating voltage when this second pattern: and
One protection voltage receiving end, in order to receive this protection voltage;
Wherein this holding circuit comprises:
One first on-off element, have and be coupled to one first receiving end of this operating voltage receiving end and there is one first output terminal that is coupled to this second driver module, under this first mode, make between this first receiving end and this first output terminal not conducting and under this second pattern, make conducting between this first receiving end and this first output terminal; And
One second switch element; have and be coupled to one second receiving end of this protection voltage receiving end and there is one second output terminal that is coupled to this second driver module, under this first mode, make between this second receiving end and this second output terminal conducting and under this second pattern, make not conducting between this second receiving end and this second output terminal.
6. driving circuit as claimed in claim 1, also comprises:
One operating voltage receiving end, receives this first operating voltage during this first mode, and receives this second operating voltage when this second pattern: and
One protection voltage receiving end, in order to receive this protection voltage;
Wherein this holding circuit comprises:
One output terminal, in order to export this protection voltage or this second operating voltage to this second driver module;
One on-off element makes this protection voltage receiving end and this output terminal conducting under this first mode, and under this second pattern, makes this output terminal and this operating voltage receiving end conducting.
7. driving circuit as claimed in claim 1, is characterized in that, also comprises:
One operating voltage receiving end, receives this first operating voltage during this first mode, and receives this second operating voltage when this second pattern;
Wherein this holding circuit comprises:
One output terminal, in order to export this protection voltage or this second operating voltage to this second driver module;
One voltage is adjusted element; under this first mode, receive this first operating voltage and adjust this first operating voltage to form this protection voltage at this output terminal, and under this second pattern, receive this second operating voltage and export this second operating voltage in this output terminal.
8. a driving method, comprises:
Make one first driver module under a first mode, operate in one first operating voltage, and close in one second pattern;
When this first mode, allow one second driver module receive a protection voltage, and under this second pattern, make this second driver module receive one second operating voltage, wherein this second operating voltage and this protection voltage are all lower than this first operating voltage; And
Make at least one part of this second driver module under this first mode, operate in this protection voltage and under this second pattern, operate in this second operating voltage.
9. driving method as claimed in claim 8, is characterized in that, this protection voltage is not more than this second operating voltage.
10. driving method as claimed in claim 8, is characterized in that, this second driver module comprises:
One predriving stage, in order to according to an input voltage to produce a predrive voltage; And
One driving stage, in order to produce a drive current according to this predrive voltage;
This driving method comprises:
Make this predriving stage, or this predriving stage and this driving stage operate in this protection voltage under this first mode, and operate in this second operating voltage under this second pattern.
11. driving methods as claimed in claim 8, is characterized in that, also comprise:
Receive this first operating voltage and adjust this first operating voltage to form this protection voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210282290.4A CN103578520B (en) | 2012-08-09 | 2012-08-09 | Drive circuit and driving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210282290.4A CN103578520B (en) | 2012-08-09 | 2012-08-09 | Drive circuit and driving method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103578520A true CN103578520A (en) | 2014-02-12 |
| CN103578520B CN103578520B (en) | 2017-03-01 |
Family
ID=50050144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210282290.4A Active CN103578520B (en) | 2012-08-09 | 2012-08-09 | Drive circuit and driving method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103578520B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI270082B (en) * | 2003-01-20 | 2007-01-01 | Samsung Electronics Co Ltd | Synchronous output buffer, synchronous memory device and method of testing access time |
| US20120008240A1 (en) * | 2010-07-07 | 2012-01-12 | Broadcom Corporation | High efficiency amplifier with reduced electromagnetic interference |
| US8179160B1 (en) * | 2010-12-17 | 2012-05-15 | Texas Instruments Incorporated | Input-output (I/O) circuit supporting multiple I/O logic-level swings |
-
2012
- 2012-08-09 CN CN201210282290.4A patent/CN103578520B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI270082B (en) * | 2003-01-20 | 2007-01-01 | Samsung Electronics Co Ltd | Synchronous output buffer, synchronous memory device and method of testing access time |
| US20120008240A1 (en) * | 2010-07-07 | 2012-01-12 | Broadcom Corporation | High efficiency amplifier with reduced electromagnetic interference |
| US8179160B1 (en) * | 2010-12-17 | 2012-05-15 | Texas Instruments Incorporated | Input-output (I/O) circuit supporting multiple I/O logic-level swings |
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| Publication number | Publication date |
|---|---|
| CN103578520B (en) | 2017-03-01 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20201026 Address after: No. 1, Xingzhu Road, Hsinchu Science Park, Taiwan, China Patentee after: MEDIATEK Inc. Address before: 405, 4th floor, 1st District, Shenzhen Bay science and technology ecological park, Aohai street, Nanshan District, Shenzhen City, Guangdong Province Patentee before: Mstar Semiconductor,Inc. Patentee before: MEDIATEK Inc. Effective date of registration: 20201026 Address after: 405, 4th floor, 1st District, Shenzhen Bay science and technology ecological park, Aohai street, Nanshan District, Shenzhen City, Guangdong Province Patentee after: Mstar Semiconductor,Inc. Patentee after: MEDIATEK Inc. Address before: 518057 Guangdong city of Shenzhen province Shenzhen city Nanshan District High Road South Chinese Technology Development Institute Technology Park Building No. three tower 4-5 No. Patentee before: Mstar Semiconductor,Inc. Patentee before: MSTAR SEMICONDUCTOR Inc. |
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| TR01 | Transfer of patent right |